System and method for image luminance transformation

a technology of luminance and display system, applied in the field of display system, can solve the problems of affecting the image quality of the pilot, affecting the pilot's night vision adaptation, and affecting the effect of image brightness, so as to achieve good contrast and hue, and effective display of images
US20060022993A1Inactive Publication Date: 2006-02-02HONEYWELL INT INC
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
HONEYWELL INT INC
Publication Date
2006-02-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

An image conversion system for altering an image to adjust the overall brightness of the image when displayed is provided. The image conversion system includes a luminance transformer and a color adjuster. To adjust the overall brightness of the image, the luminance transformer reverses the luminance of each original color in the image. The new luminance of each transformed color is then compared to the desired luminance for that color. When the transformed colors do not have the desired luminance, the color adjuster modifies the hues of transformed color to achieve the desired luminance. Specifically, the color adjuster modifies the transformed color using a weighted average to achieve the desired luminance while maintaining the hues of the original color to the extent possible. By substituting each original color with a transformed color that is adjusted as needed to reach the desired luminance, the overall brightness of the image is adjusted.
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Description

FIELD OF THE INVENTION

[0001] This invention generally relates to display systems, and more specifically relates to luminance adjusting for displayed images. BACKGROUND OF THE INVENTION

[0002] Various types of optical displays are commonly used in a wide variety of applications. For example, computing devices such as personal computers, workstations, and personal digital assistants (PDA) and communication devices such as mobile phones and radios all use various types of displays. Displays are also commonly used for a variety of purposes on vehicles such as automobiles and aircraft. Optical displays can use a variety of different display mechanisms, such as LCD, CRT, projection and other devices.

[0003] One new application in which optical displays are being applied is in aircraft avionics systems. For example, in an aircraft avionics application, a multi-function display can be used to provide a variety of different types of information to the pilot by dividing the display into a pl...

Claims

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